CN102716795A - Shredder control system based on permittivity - Google Patents

Abstract

The invention discloses a shredder control system based on permittivity. The touch stopping protective function is carried out through a series of electronic circuits, input signals and processing signals are received from the conductive touch panel of the paper inlet of the shredder, and the running of the movement of the shredder can be stopped by a motor driving circuit. The system includes a touch stopping detection circuit unit which further includes a touch-control control circuit to induct the conductive touch panel. The touch-control control circuit is configured to trigger the grounding switch circuit of the touch stopping detection circuit unit, and to output to a multifunctional safety touch stopping protective module. The safety touch stopping protective module performs the next protective function. The shredder touch stopping protective device prevents human being and other living beings such as pets from being injured through automatic and real-time monitoring. The whole controlling process is safe and accurate.

Description

Based on dielectric constant formula shredder control system

Technical field

The present invention relates to the shredder technical field, the control device of shredder especially, particularly a kind of shredder control system.

Background technology

Automated office equipment increases sharply in the live and work in modern times, and wherein one of modal equipment is exactly shredder.At present, shredder, some of them have the automatic safe sensor, have obtained extensive use in family and commercial field.Paper inlet of paper shredder has a narrow gap, is admitted to the shredder reducing mechanism through its paper.This narrow gap of going into the paper passage can be used to prevent that user or the opposing party from contacting kneader bar accidentally through design limit size, perhaps prevents that through the restriction opening exterior object from falling into protection kneader bar device.In routine operation, be connected the shredder motor starting on the kneader bar, kneader bar is relatively rotated, pulverize or shred material therebetween.Sensor can be arranged to and detect the object that inserts paper inlet of paper shredder, and starts the shredded paper operation through the shredder motor is switched on, and is involved in this object through the kneader bar pulverizing.Shredder can keep "on" position and be ready to operation, only if it is switched off.Though the shredder that under standby mode, is activated is convenient,, possibly there is the risk that hurts people or other biological.For this reason, some advanced shredders may use the multisensor security system of intelligent precise.Some present shredders not protection equipment prevent that unsuitable object or biological body part are strayed into shredder and go into the paper passage, cause unacceptable potential safety hazard.In addition, shredder excessive gone into paper and As time goes on can be caused machine performance not good, may shorten its operation lifetime.Some are excessive goes into the paper detector and is mechanical realization at present, and this depends on the practicality design.

When excessive paper is urged into paper inlet (" excessive go into paper "), may opens the paper piece that the back forms thickening broken, and possibly stop up into the paper passage.Possibly cause the shredder motor overload if this paper number of blocks is abundant, and make the shredded paper operation stop (" obstruction ").Excessively go into paper and stop up two kinds of situations and all disadvantageous stress is imposed to shredder motor and motor on the power transmission system of kneader bar.Stop up or excessively go into the paper situation and can impel the operator to attempt to clear up this obstruction or excessive to go into paper, this has also improved the injury risk to the operator.But, often high can not the accepting of cost of the complex appts of attempting to address this problem.Therefore need a kind of paper inlet of paper shredder safety device, it improves user's security with lower cost.

Summary of the invention

The present invention utilizes the variation of paper inlet of paper shredder appearance value to solve above-mentioned shortcoming through providing a kind of based on dielectric constant formula shredder control system.This control procedure safety is accurate.This circuit performance is stable, and can be widely used.In order to reach above-mentioned target, the dielectric constant sensor arrangement that is used for shredder is following.

Saidly comprise functional module, power module, conduction touch panel and shredded paper mechanical part based on dielectric constant formula shredder control system.Said functional module comprises touches the stopping detecting circuit unit, and paper testing circuit unit is gone in motor counter-rotating testing circuit unit, the overload protecting circuit unit, and safety is touched and is stopped protection module, and is provided with the functional switch of open and close and reverse three positions.Except that functional switch, all unit in the said functional module all can be directly connected to safety and touch and stop protection module, and said functional switch touches together with said safety and stops protection module and control the motor drive circuit unit, and then control shredded paper mechanical part.

Said power module can comprise the power interface switch, safety switch, and protective tube, gauge tap, safety is touched and is stopped protection module power supply and motor drive circuit unit.The power interface switch, safety switch, protective tube and gauge tap can be connected in series, and by functional switch control, are connected to the motor drive circuit unit.Said gauge tap is a relay switch.The said civil power protective tube of flowing through, through over commutation, filtering and voltage stabilizing come for all circuit units direct current to be provided.

Said conduction touch panel can be connected to the said stopping detecting circuit unit that touches.The said stopping detecting circuit unit that touches comprises touch-control control circuit and earthed switch circuit.Said touch-control control circuit can be the transistor circuit that comprises the previous stage triode, and said touch panel is connected in the base stage of said previous stage triode through first resistance.The base stage of said previous stage triode is through the parallel connection combination ground connection of second resistance and first capacitor.The emitter stage of said previous stage triode is through the parallel connection combination ground connection of the 3rd resistance and second capacitor, and this emitter stage also inserts the input of said earthed switch circuit simultaneously.

The colelctor electrode parallel drive of said previous stage triode, power supply is indicated light emitting diode and is touched discontinuance and show that light emitting diode inserts said power supply then.Said earthed switch circuit is the switching transistor circuit that comprises back one-level triode.The base stage of said back one-level triode inserts the output of said touch-control control circuit, its grounded emitter, and its colelctor electrode inserts said safety through photo-coupler and touches the input that stops protection module, and insert said power supply through the 4th resistance.

Saidly go into paper testing circuit unit and also insert said safety and touch and stop protection module.Saidly go into paper testing circuit unit and comprise and transmit and receive photoelectric tube.The former luminous site and the latter's sensitization position is positioned opposite to each other and be arranged at shredder respectively and go on the opposing sidewalls of paper passage.Said overload protecting circuit unit and said motor counter-rotating testing circuit unit all inserts said safety and touches and stop protection module.

Saidly adopt series circuit to guarantee the personal safety when the people touches said conduction touch panel based on dielectric constant formula shredder control system.Electricity from human body starts said touch-control control circuit unit, and then starts the circuit that all are attached thereto.Thereby said safety is touched and is stopped protection module and the movement of said shredder can not be worked guaranteed personal safety.Even power switch is opened, the movement of said shredder does not still turn round.Said shredder has been realized real-time monitoring.Whole control process safety is accurate.Said shredder performance when supervision nobody also be stablize, reliable and easy-operating.

In said some other embodiment based on dielectric constant formula shredder control system, kneader bar is set to respond to the induced electricity from the user.When on said kneader bar, detecting induced electricity, the control system responds through the shredder movement is launched stop, stops kneader bar in fact.In other other embodiment, said shredder motor is outage before launching stop, is added in the moment of torsion on shredder transmission system and the servo system to reduce in the said kneader bar moderating process.

Description of drawings

Fig. 1 is a circuit diagram of having demonstrated the electric component of the shredder control system that uses prior art;

Fig. 2 is a kind of assembly that stops responding in the shredder control system and block diagram of module of touching of the present invention;

Fig. 3 is a kind of circuit diagram that stops responding to shredder control system electrical assembly that touches of the present invention;

Fig. 4 is a kind of circuit diagram that stops responding to another embodiment electric component of shredder control system that touches of the present invention;

Fig. 5 is to a kind of flow chart that stops responding to the control procedure that shredder control system uses that touches of the present invention;

Fig. 6 is a kind of embodiment demonstration that stops the device of shredder gear rotation;

Fig. 7 is a flow chart of having demonstrated the operation of one embodiment of the invention;

Fig. 8 stops responding to the circuit diagram that kneader bar is controlled the electric component of an embodiment of system according to a kind of touching of the present invention;

Fig. 9 stops responding to the circuit diagram that kneader bar is controlled the electric component of another embodiment of system according to a kind of touching of the present invention;

Figure 10 is according to a kind of vertical view that stops responding to the shredder control another embodiment of system that touches of the present invention;

Figure 11 stops responding to the shredder control system vertical view of an embodiment again according to a kind of touching of the present invention;

Figure 12 is the derivation diagram according to a collection of pulverizing raw material dielectric constant of the present invention;

Figure 13 A is according to the diagram that comprises the dielectric constant sensor of first kind of distribution of sensing element of the present invention;

Figure 13 B is according to the diagram that comprises the dielectric constant sensor of second kind of distribution of sensing element of the present invention;

Figure 13 C is the diagram that comprises the dielectric constant sensor of the third distribution of sensing element according to of the present invention;

Figure 14 is according to a kind of diagram based on a dielectric constant formula shredder control embodiment of system of the present invention;

Figure 15 is the diagram according to the dielectric constant sensor of use oscillating circuit of the present invention;

Figure 16 is according to a kind of cross section diagram that comprises based on the shredder of dielectric constant formula controller of the present invention;

Figure 17 is according to an a kind of schematic diagram based on dielectric constant formula shredder control system of the present invention;

Figure 18 is according to a kind of block diagram based on dielectric constant formula shredder control first embodiment of system that has start-up operation of the present invention;

Figure 19 is according to a kind of block diagram based on dielectric constant formula shredder control second embodiment of system that has start-up operation of the present invention;

Figure 20 is the flow chart according to shredder operation main program of the present invention;

Figure 21 is the flow chart according to the initialization subroutine of shredder operation of the present invention;

Figure 22 is the flow chart according to the door open routine of shredder operation of the present invention;

Figure 23 is the flow chart according to the overtemperature protection subprogram of shredder operation of the present invention;

Figure 24 is a flow chart of setting subprogram according to the threshold value of shredder operation of the present invention;

Figure 25 is the flow chart according to the machine overload subprogram of shredder operation of the present invention;

Figure 26 is the flow chart that manually moves back the paper subprocess according to shredder operation of the present invention;

Figure 27 is the flow chart according to the machine paperboard subprogram of shredder operation of the present invention;

Figure 28 is the flow chart of manually going into the paper subprogram according to shredder operation of the present invention;

Figure 29 is the flow chart according to the self-lock protection subprogram of shredder operation of the present invention;

Figure 30 is the flow chart of going into the paper subprogram automatically according to shredder operation of the present invention;

Figure 31 is the flow chart of going into the paper subprogram according to the time-delay of shredder operation of the present invention;

Figure 32 is the flow chart according to the full subprogram of paper of shredder operation of the present invention;

Figure 33 is the flow chart according to the unusual subprogram of dielectric constant of shredder operation of the present invention;

Figure 34 is the flow chart that stops protecting subprocess that touches according to shredder operation of the present invention;

Some embodiment are elaborated with reference to relevant drawings.Additional embodiments, its feature and advantage will become in ensuing description obviously, maybe can be understood through putting into practice the present invention.Proportionally do not draw among each figure, identical numeral is through describing corresponding identical characteristic.Following description is not used in qualification, only is used to set forth rule of the present invention.

The specific embodiment

In shredder now, there are some shredders to adopt to touch and stop detection technique and prevent that kneader bar from hurting people or pet.Referring to Fig. 1, the circuit of wherein showing is the example of this technology.SW2 is a slide switch, and it can switch the live wire and the zero line of civil power.Resistance R 12 and R13, capacitor C3 and C2, and diode D11, D12, D13, D14, D15 and D6 form the 24V power circuit of relay.Diode D6, D7 and capacitor C1 form the power circuit of voltage checking chip U1.The positive pole of said power supply is the live wire of civil power.Relay switch RLY-1, diode D2, triode Q1, resistance R 5, R27 and R6, and photo-coupler U5 forms machine operation power supply circuits.Diode D1, D8 and D21, temperature control indicator lamp (orange), triode Q4, resistance R 4, R14, and R11, and the motor temperature detect switch (TDS) is formed the temperature control indicating circuit.Fuse F1, relay switch RLY1, motor, functional switch, and the motor temperature detect switch (TDS) is formed the motor operation circuit.The motor running direction is determined by the functional switch present position.Power supply, resistance R 7, R1, R9, R2, R8 and R10, diode D20, D16, D4, D5, D9 and D10, triode Q2 and Q3, and the pin 5 of voltage checking chip is formed LED lamp indicating circuit.The metal decking part, resistance R 20, R19, R21 and R22, capacitor C8, and diode D19 and D17 form and touch stopping detecting circuit.

When said functional switch was in the position of " pass ", machine was not worked.When said functional switch is arranged on non-closed position and waste-basket and separates with machine, though machine open, can not shredded paper.When waste-basket separated with machine body, said magnetic reed switch broke off and cuts off motor power.The magnetic reed switch dead circuit is operated as follows: the pin 1 of voltage checking chip U1 detects the signal that magnetic reed switch breaks off, the pin 5 output high level of U1, and Q3 and Q2 end, and motor does not turn round.Power supply indicator with touch stop/waste-basket separates indicator lamp, R7, R8, D9 and motor temperature detect switch (TDS) are formed current loop, thus power supply indicator with touch stop/that waste-basket separates indicator lamp is bright.

When said functional switch is removed from the position of " pass ", and waste-basket is when going into, and machine has been ready to running.The order of circuit operation is following: pin 1 output low level of U1, Q3 and Q2 conducting.Simultaneously, pin 6 output low levels that U1 is last, the Q1 conducting, relay R LY1 breaks off.If this moment, functional switch was arranged on " opening ", go into phone device that the paper passage has paper with shredded paper when said, otherwise the shredder standby.At this moment, if staff, metal; Or animal touches the metal section and part that paper inlet is gone into the paper passage, civil power so, component (R21; R19, R20) and said contact will form a loop, and owing to 8 this moments of the pin of U1 be the former of high level thereby turn off motor for the pin 5 and 6 of low level and U1.In particular, when the pin 6 of U1 was high level, Q1 ended, and said motor power breaks off.When the pin 5 of U1 was high level, Q2 and Q3 ended, and said touching stops protecting indicator lamp bright.Go into from paper inlet after the paper passage removes in said contact, shredder turns back to normal running.

Saidly touch that to stop protecting be to comprise that through be provided with one at paper inlet conducting electricity the dielectric constant sensor of touch panel reaches.When the people touched said conduction panel, the electrical conductivity of human body provided a faint signal to excite to touch to control circuit to stop protection.In this case, the resistance of two the 2.2M ohms therefore said circuit harm people not of electric current that greatly reduces the human body of flowing through.Use the sensitive voltage checking chip of this Technology Need to come the state of the said touch panel of monitoring in real time.Therefore need high stability and sensitive chip.The aging measuring ability that also will weaken even lose circuit of the circuit that causes by long-term use.For two high resistance resistance, their limit the electric current of the human body of possibly flowing through, but they possibly lose efficacy in wet environment, caused the people may directly contact the civil power live wire, caused electric shock, even threat to life.

In an embodiment of the present invention, saidly can comprise following assembly: functional module, power module, and shredder movement based on dielectric constant formula shredder control system.Referring to Fig. 2, said functional module comprises touches stopping detecting circuit unit 4, and paper testing circuit unit 5 is gone into, overload protecting circuit 6, controller 3 and functional switch 86 in motor counter-rotating testing circuit unit 7.All these unit all are directly connected to controller 3 except that functional switch, said functional switch is controlled motor drive circuit unit 2 jointly together with said controller, and then control shredder movement 1.The conduction touch panel is connected to the said stopping detecting circuit unit that touches, and the said stopping detecting circuit unit that touches comprises touch-control control circuit and earthed switch circuit.

Said power module comprises power interface unit 81, safety switch 82, protective tube 83, gauge tap 84, controller power source 85 and motor drive circuit unit 2.Said gauge tap is a relay switch, and said safety switch is a door switch.Above-mentioned preceding four units in series, and the control through functional switch 86 inserts the motor drive circuit unit.Said power supply is connected to said controller power source through said protective tube, is connected to said controller then.

Turn to Fig. 3, in one embodiment, said touch-control control circuit is mainly switching transistor circuit.Said conduction touch panel inserts the base stage of switch triode Q4 through resistance R 5.The base stage of triode Q4 is through the capacitor C7 and resistance R 6 ground connection of parallel connection, and its colelctor electrode directly inserts power supply VCC, and its emitter stage is through the capacitor C8 and resistance R 16 ground connection of parallel connection.The emitter stage of Q4 also directly inserts said earthed switch circuit.

Said earthed switch circuit also is a switching transistor circuit.Saidly touch the input that the output that stops control circuit inserts said earthed switch circuit, like the emitter stage of triode Q2.The direct ground connection of the emitter stage of triode Q2, its colelctor electrode inserts VCC through resistance R 7, and its colelctor electrode also passes through the input of photo-coupler U1 access controller simultaneously.

Referring to Fig. 4, in another embodiment, the touch-control control circuit comprises triode Q3.Said touch panel inserts the input of said touch-control control circuit; For example, insert the base stage of switch triode Q3 through the tandem compound of resistance R 6 and R7, the base stage of triode Q3 is through capacitor C3; Diode D4; With the parallel connection combination ground connection that resistance R 8 is formed, its colelctor electrode is through power supply indicator and touch the parallel connection combination access power supply VCC that stops indicator lamp LED3, and its emitter stage directly inserts the input of said earthed switch circuit.

Said earthed switch circuit also is a transistor circuit.The output of said touch-control control circuit such as, the emitter stage of triode Q3, directly inserts the base stage of said switching mode triode Q2.The direct ground connection of the emitter stage of triode Q2, the input of its colelctor electrode access controller 3.

Referring to Fig. 2; Saidly go into paper testing circuit unit access controller 3; Turn to Fig. 3 now; Saidly go into paper testing circuit unit and comprise emission phototube IT1 and accept photoelectric tube IR1 that parallel opposite, the former luminous site and the latter's sensitization position is provided with and is arranged at shredder respectively to go on the opposing sidewalls of paper passage.Overload protecting circuit unit 6 all inserts said based on dielectric constant formula shredder controller 3 with motor counter-rotating testing circuit unit 7.

Return Fig. 2, motor counter-rotating detecting unit 7 with go into paper detecting unit 5 and all be linked into controller 3, and then, arrive shredder movement 1 then to motor drive circuit unit 2.Motor counter-rotating detecting unit 7 detects reverse signal, imports this signal of telecommunication into controller 3, and electronic then control shredder movement 1 makes the motor counter-rotating through motor drive circuit unit 2.Go into paper testing circuit unit 5 and detect the insertion of going into paper in the paper passage at paper inlet, and import this signal into controller 3, and then through motor drive circuit unit drives shredder movement shredded paper.

Referring now to Fig. 5,, in the shredded paper process, if there is the people to touch the touch panel that paper inlet is gone into the paper passage, shredder will stop immediately.Said touch signal is transferred into and touches stopping detecting circuit unit 4, arrives controller 3 then, and makes shredder out of service through the power supply that cuts off motor drive circuit unit 2.If nobody touches said conduction touch panel, controller will unclamp the control to motor drive circuit unit 2, allow said movement independent operation.

Refer back to Fig. 3, said shredder is made up of following function: overload protection; Light-operated shredded paper; Shredded paper is closed and reverse function; And touch stops automatically.

The power supply of said controller is described below.The civil power of input is by by resistance R 1 and R2, capacitor C1 and C2, and diode D5 and D6 shunt rectification, voltage stabilizing and filtering with the circuit of Zener diode ZD1 composition.24V direct current after the voltage stabilizing is the power supply of said controller.It is much smaller than can not damaging the human or animal through the safe voltage of human body.

The said power supply that touches the stopping detecting circuit unit is described below: the civil power of input through bridge rectifier, provides 12V DC voltage through voltage stabilizing and filtering.Said circuit comprises diode D1-D4, Zener diode ZD2, resistance R 12 and capacitor C3.

When the people touches said metal decking, arrive the base stage of triode Q4 through 1 megaohm resistance from the induced electricity of human body.Said induced electricity causes triode Q4 and Q2 conducting, and triode Q3 ends, and then the cut-out motor power, the self-braking purpose of shredder when reaching the someone and touching paper inlet and go into the paper passage.

Referring now to Fig. 4,, the shredder in the present embodiment has following functionalities to become: on-off LED indication; Touch and stop protecting the LED indication; Overload LED indication; The civil power indication; Light-operated shredded paper; And shredded paper, close and reverse function.

Said overload protection and Men Kai LED deixis comprise R18 through one, R14, and R13, R11, and R12, LED 1 and LED2, diode D10, D9, Zener diode ZD2, the circuit of capacitor C5 and controllable silicon SCR is implemented.

Said controller power circuit be one by resistance R 1 and R2, capacitor C1 and C2, diode D1 and D2, the circuit of Zener diode ZD1 and capacitor C2.With the power supply of same voltage stabilizing 24V dc source as said controller.It can not damage the human or animal much smaller than the safe voltage through human body.

Saidly touch that to stop functional description following.When the people touches metal decking, arrive the base stage of triode Q3 through resistance R 6 and R7 from the induced electricity of human body.Said electrical signal of reaction causes Q3 and Q2 conducting, and Q1 ends, and cuts off motor power, and motor stops operating, and the people is protected.If the said stopping detecting circuit unit that touches adopts independently the bridge circuit power supply and isolates through photo-coupler and said motor, its understands more stable.

When the people touched said panel, the people provided triggering signal in the touch of panel metal section and part, and this signal is opened Q3 through base stage power supply road.Said base stage power supply road comprises resistance R 7, R6 and R8, diode D4 and capacitor C3.If enough from the forward voltage that human body comes, Q3 and Q2 will conductings simultaneously.When the Q2 conducting, its collector voltage reduces, and then opens to touch through R5 and stop indicator lamp, through D16 Q5 is ended, and through D15 Q1 is ended.If reversal of machine running this moment, Q5 will conducting.But because said touch voltage, Q5 ends, and motor is closed.Another kind of situation is when machine is in the comminution attitude.This moment, Q1 made the motor forward rotation with conducting.But because people's touch, Q1 ends, and motor also cuts out.In either case, machine all cuts out to guarantee people's safety.

When the people no longer touched the metallic plate of machine, triode Q3 was not owing to there being trigger voltage to close, and machine is got back to normal operating conditions.The operation principle of said power indicating circuit is following.Select to be in by functional switch when machine and pulverize or during inverted status, power supply indicator is bright, when machine during in halted state indicator lamp go out.Said power indicating circuit comprises indicator lamp, resistance R 17 and R16, and triode Q4.When machine is in halted state, because triode Q4 does not have conducting, so indicator lamp goes out.For inverted status, the tie point of the emitter stage of the emitter stage of triode Q4 and diode D12 and functional switch built-up circuit loop, power supply indicator is bright.When machine is in the comminution attitude, the emitter stage of Q4, diode D13 and functional switch built-up circuit loop, power supply indicator is bright.

Point less user, particularly child, have the finger that to avoid shredder machine security system.Accordingly, embodiments of the invention can comprise a shredder security system, and this system can significantly be activated by the kneader bar contact.Different with the proximity detector that starts safety measure when gtoal setting shredder crust component during to preset distance, kneader bar touch-stopping safety system described herein by with the target contact start of kneader bar.

Usually, when controlling system by the kneader bar contact start based on dielectric constant formula kneader bar, power supply and shredder motor break off.Biology sensor is a kind of sensor that when contacting with biology and receive bio signal Tathagata from biological electrical signal of reaction, can cause a kind of effect.Especially, when biology contacts said kneader bar, by said biogenic electrical signal of reaction be connected on the kneader bar biology sensor just the bio-safety blade detect.The electrical signal of reaction that is received by said bio-safety blade produces bio signal, and it can start safety touches and stop protection module and cause that safety stops, and wherein the shredder motor is de-energized at least.

Go to Fig. 6, another embodiment of the present invention has been described.The magnetic valve 27 that control circuit 35 can be provided with a snap action is used as mechanical electric power stop 25, the rotation of this stop restriction kneader bar.For example, stop 25 can be placed near the transmission system of the transmission system between motor and the blade, and said transmission system is such as the meshing gear of reference 55 representatives, the rotational synchronization of this gear and kneader bar.

After response and being started, stop 25 engageable travelling gears, or driven gear, perhaps above-mentioned both.When the user contacts with kneader bar, cause stop 25 to be located between the said engaging tooth 55 of travelling gear and driven gear from user's electrical signal of reaction, slow down rapidly and stop kneader bar.The stop 25 that absorbs kneader bar residue rotation potential energy can be by durable, and is flexible, anti abrasive and impact absorbency material, such as but not limited to, high density polyethylene (HDPE) is formed, although other materials also possibly be suitable such as the natural rubber of sclerosis.The first-selected cheapness of the material of stop 25 very possibly not damaged engaging tooth 55.Stop 25 can be rubber chock form, and it can be installed on the rapid-action magnetic valve 27 to reach fast stationary positioned stop 25.Said chock can be by durable, and flexible, wear-resisting forms with impact absorbing material, such as elastomeric material.

Typically, magnetic valve 27 can be plug-type magnetic valve form, is started by control circuit 35, and control circuit 35 is used to respond the biogenic electrical signal of reaction that contacts with kneader bar.Before stop 25 location, the shredder motor can stop, and magnetic valve 27 can be activated afterwards, causes fast " soft stopping " at 55 insertion chocks 25 of engaging tooth." soft stopping " can obviously reducing engaging tooth or other mechanical transmission part or contact the user of kneader bar and the traumatic possibility that contacts of kneader bar.

Other embodiment can use the shredder gear that clutch stops to turn round as machine power stop 25 and then be blades.Such as, thereby clutch can be untied a gear owing to cause said axle to stop operating with the relevant frictional force of blade interaction from the axle that is connected gear.Another clutch example can be the clutch between motor and gear-box, and it can discharge the moment of torsion that is transmitted by said motor.Another embodiment can comprise a circuit, and it makes the current reversal through motor arrive certain certain degree, has offset the motional inertia of motor, therefore causes electromagnetic braking.This system can produce the reverse of considerably less (if any) on motor.

Fig. 7 has demonstrated the two-stage guard method 700 of a kind of operation based on dielectric constant formula shredder control system.In the first order, shredder is provided at the first sensor of first phase of sensitization response.In the second level, shredder is provided at second sensor of second phase of sensitization response.Among the embodiment herein, the first order can be made up of the kneader bar sensor, and this sensor is responded to and biological contacting from the induced electricity (or electrical signal of reaction) of the indication contact of biology through reception.The second level can be made up of the conduction touch panel, and said panel is responded to and biological contacting through receiving from the electrical signal of reaction of biology indication contact.In a particular embodiment, said first order process can comprise that the said electrical signal of reaction of coupling touches to said safety and stops protection module.As response, said safety is touched and is stopped protection module and can make shredder motor outage and arrange stop in machine driven system, and kneader bar is quick and complete stops in control.Similarly, second level process can comprise that the electrical signal of reaction that coupling is applied on the said conduction panel arrives said touch panel unit, and this touch panel unit representative of the inductive coupling signal of telecommunication conversely stops protection module to touching safely.As response, said safety is touched and is stopped protection module and can make shredder motor outage, causes the kneader bar stall.

In further embodiments, single-phasely stop to be used to said first phase of sensitization, wherein the kneader bar sensor is responded to and the contacting of biology through receiving from the electrical signal of reaction of biology indication contact.The representative of electrical signal of reaction afterwards can be coupled to said safety and touch and stop protection module.As response, said safety is touched and is stopped protection module and can make shredder motor outage and arrange stop in machine driven system, and kneader bar is quick and complete stops in control.

Fig. 8 is a circuit diagram of having demonstrated based on the embodiment 800 of dielectric constant formula kneader bar control circuit.Although the touch panel relevant control circuit among Fig. 8 and Fig. 3 has some functional similarity; It is distinguishing with circuit among Fig. 3 that but those skilled in the art still can realize based on dielectric constant formula kneader bar control circuit 800, is to the induced electricity that receives from biology and responsive from the induced electricity on the kneader bar 820 the most significantly touching on the adaptability of stopping control system 810.

Stop control system 810 and can represent the induced electricity of sensing with Q4 generation signal 825 for responding of the touch of detected biology, touching through activating (ON) series connection triode Q3 to the metal kneader bar.Bio signal 825 can be coupled in the Q2 of main control circuit 850 through photo-coupler OPT01.OPT01 can further separate the biology that touches kneader bar 820 with the potential fatal electric power that is used for starter 840.Triode Q2 can be used as switching manipulation, and when OPT01 received that bio signal is represented, triode Q2 can be set to end, and drove dynamo-electric limit element 860.Electromechanical limit element 860 can comprise relay coil, and this relay coil can make motor 840 outages when triode Q2 closes.In addition, electromechanical limit element 860 also can comprise magnetic valve, and this magnetic valve is connected to the machine driving stop.

In the environment of Fig. 6, the non-limitative example that is connected to the magnetic valve of machine driving stop can be the magnetic valve 27 that is connected to machine driving limiter 25.When triode Q2 ended, said magnetic valve can cut off the power supply, and causes machine driving stop 25 to be driven into mechanical transmission part, in engaging tooth 55.Replacedly, the non-limitative example of another machine driving stop can be the clutch that is connected on the electromechanical limit element 860.In another unrestricted replaceable example, machine driving stop 25 can be implemented by chock and clutch, and wherein dynamo-electric redundancy is selected.

Fig. 9 is the circuit diagram of having demonstrated based on another embodiment 900 of dielectric constant formula kneader bar control circuit.Blade touches stop sensor 910 can be connected to IC I920, for example, and on pin 16.The bio signal that is received from blade biology sensor 910 is received pin 16, and next pin 16 makes pin 15 end or on pin 15, be provided with the power supply signal of " low ".The power supply signal of this " low " is received by NPN triode Q1, and triode Q1 responds said low signal and ends, and causes motor 930 to be de-energized.In addition, also configurable I CI920 provides " height " signal (motor forwards/reverse) on pin 14.Can be coupled from " height " signal of pin 14 and to start NPN triode Q2 and make motor 930 counter motions, this action need time long enough is at least carried out the electric braking of kneader bar.In addition, triode Q2 and relay R LY-2.3 can be the part of electromechanical limit element, and said electromechanical limit element also can comprise the wedge mechanical stop, the clutch mechanism stop, or the both has.

In other embodiment of the present invention, the sensor that comprises the Metal Contact element that is oppositely arranged also can be inserted shredder inside except inserting the kneader bar.When biology contacted said Metal Contact element, the said sensor that is oppositely arranged caused safety and touches and stop protection module and cause safety to stop.A safety stops to be set at the shredder motor outage that makes forward rotation or shredded paper direction.Equally, safeguard protection can be set a switching stop prevention kneader bar motion fast.Further, when safety stopped, said shredder motor in the opposite direction moment energising caused the kneader bar electric braking.

Turn to Figure 10, whole (be convenient, be called " shredder ") 1000 of shredder can be provided with the inner chamber 1010 of kneader bar 1020.The inner chamber 1010 of shredder 1000 can comprise framework, and usually 1030, this framework part at least surrounds blade 1020.Support frame 1030 can comprise that one or more how common horizontal support base construction are such as member 1032 and one or more how common vertical base construction, for example member 1034 (horizontal direction is oriented to the longitudinal axis that is parallel to kneader bar 1020).

In the unrestricted embodiment 1000 of some selected shredders, at least a portion of at least one member of support frame 1030 can be metal material, forms a Metal Contact element.Said Metal Contact element can be the part of said metal base structure.In some selected embodiment, support frame 1030 can be made up of the conducting metal member, and whole so in fact support frame can be a metallization contact.Metallic support framework 1030 can be placed on the lower cover 1060.The kneader bar 1020 that framework 1030 can be in the shredder 1000 provides improved support structure, and the machine driven system that probably reaches by the motor drive shaft representative for shredder motor 1090 provides support.One or more bio-sensing element can be set near the support frame 1030 or on it, form the cutter core assembly.The cutter core assembly can comprise at least one or more kneader bars 1020, comprises one or two the support frame 1030 in base construction 1032 or 1034, metallic gasket 1040, sensor 1050, or lower cover 1060.Behind the electrical signal of reaction of receiving from biology, said cutter core assembly can cause that bio signal 1054 is transferred to control system (safety is touched and stopped protection module) 1055, cuts off the shredder power supply.

Usually, said Metal Contact element, such as what represent by supporting base structure 1032 or 1034, away from (such as, do not contact) the kneader bar setting, and can be inserted between kneader bar inlet (at a loam cake, not shown in the figures) and the kneader bar 1020.Typically, said Metal Contact element 1032 is connected to sensor 1050, and this sensor is used for receiving the electrical signal of reaction 1052 from the biological (not shown) that contacts with Metal Contact element 1032, and produces representational electrical signal of reaction 1054.The Metal Contact element 1032 that is connected on the sensor 1050 can be described to a biology sensor that is oppositely arranged (combine, be the biology sensor 1051 that is oppositely arranged), and electrical signal of reaction represents 1054 can be described to bio signal.The biology sensor 1051 that is oppositely arranged can be activated coupled biological signal 1054 to stop protection module 1055 to touching safely.The biology sensor 1051 that is oppositely arranged can be used to respond to biological near region contact to kneader bar 1020, and this moment is biological with not directly contact of kneader bar 1020.

Response detects the biology sensor that is oppositely arranged 1051 of near region contact, and safety is touched and stopped protection module 1055 and can cause safety to stop, control kneader bar 1020 quick and complete stopping.When safety stopped, safety was touched and is stopped the break power supply 1094 of shredder motor 1090 of protection module 1055, aforesaid stop also can be set to machine driven system 1095, or the both uses.In the embodiment that the motor return motion is allowed to, safety touch stop protection module 1055 can be to shredder motor moment energising in the opposite direction causing electric braking, this can be further and reduces the positive-directional and inertial motion of kneader bar faster.

In the unrestricted alternative embodiment that Figure 10 shows; The Metal Contact element can be the section that is arranged on the shredder, bar, or common circumferential ring; Be arranged in 1020 minutes with kneader bar, usually go into the setting of paper direction above that with respect to what get into kneader bar 1020.The shape of said Metal Contact element can be continuous or is interrupted.Shown in figure 10, the strip metal contact element of a unrestricted embodiment can comprise metal blade pad 1040, and it can be arranged between adjacent the kneader knife piece element 1042A and 1042B.One or more metal blade pads 1040 can be connected to sensor 1050, and when coming in contact with biological (not shown), sensor 1050 can be accepted electrical signal of reaction 1041 from metal blade pad 1040 like this.Usually, the blade pad is provided with a pad contact interface assembly that is oppositely arranged, and is relevant and divide and be arranged with near kneader knife piece element (for the purpose of clear, being component of the blade 1042A and 1042B).

In such an embodiment, biology comes in contact and can stop protection module 1055 to touching safely by initiation biology sensor 1050 transmission bio signals 1054 with hardware 1040.Next, safety is touched and is stopped protection module 1055 and can 1094 carry out safety and stop through cutting off the electricity supply, and from 1090 outages of shredder motor.In this stopped safely, safety was touched and is stopped protection module 1055 and aforesaid stop also can be set to machine driven system 1095, drives kneader bar 1020 quick and complete stopping.When shredder motor 1090 was configured to reverse, safety was touched and is stopped protection module 1055 and can make motor 1090 counter-rotating causing electrodynamic braking through energising.Use among the embodiment of electrodynamic braking at some, safety is touched and is stopped protection module 1055 configurable aforesaid stops, and the instantaneous electrodynamic braking with an enough time is provided with simultaneously usually, control kneader bar 1020 quick and complete stopping.

Therefore in first unrestricted example, a plurality of hardwares of support frame 1010 can be electrically connected and be connected to sensor 1050 mutually, and safety is touched and stopped protection module 1055 and can respond and occur in that biological and framework 1030 are a certain to be connected surperficial contacts and to cause safely and stop.In second unrestricted example, a plurality of metal blade pads 1040 can be electrically connected to sensor 1050, make control system (safety is touched and stopped protection module) 1055 can respond biological causing safely with contacting of one of them metal blade pad 1040 and stop.In the 3rd unrestricted instance; A plurality of hardwares of support frame 1010 and a plurality of members of metallic gasket 1040 can be electrically connected to sensor 1050, make control system 1055 can respond with biological and hardware, metal blade pad in contacting of at least one cause safe stopping.In the 4th unrestricted instance, safety is touched and is stopped protection module 1055 and can be set to control the shredder function, as; Motor power; Overheated, perhaps stop up, activated by a starting switch; Optionally activate at a predetermined active period, perhaps be received or temporary transient reverse motor during the energising of " not stall " starter when an electrical signal of reaction.

Figure 11 has demonstrated the vertical view of shredder whole 1100, with one with Figure 10 in the similar height of shredder 1000.In other non-limiting example of selecting according to the present invention; Shredder framework (usually 1110) can be connected to blade baffle plate 1111; 1112, single blade baffle plate 1111 and 1112 is arranged through the longitudinal axis branch of a predetermined baffle plate gap 1115 with respect to kneader bar 1120.Predetermined baffle plate gap 1115 can be limited by crushed material through size design and got into the zone in the baffle plate gap 1115. Blade baffle plate 1111 and 1112 can be set at kneader bar 1120 tops, and is arranged in 1120 minutes with kneader bar.Usually, below baffle plate gap 1115 can be set at, and vertically align with the paper inlet opening (not shown) of shredder 1100.Blade 1100 is left enough far with 1100 normal runnings of permission shredder in baffle plate gap 1115, but the inlet of restriction kneader bar and their unexpected hazardous environment.

One or two be electrically connected to biology sensor 1150 in the blade baffle plate 1111,1112 forms combined bio sensor 1151.The electrical signal of reaction 1141 that the biology that 1111,1112 receptions of blade baffle plate contact with the blade baffle plate that is electrically connected transmits, and can this electrical signal of reaction 1141 be reached sensor 1150.As response, sensor 1150 can produce bio signal 1130, and this bio signal 1130 can be touched by safety and stop protection module 1155 receptions.Stopped protection module 1155 when receiving when bio signal 1130 touches by safety, safety is touched and is stopped protection module 1155 and can stop to respond through carrying out safety.Stop similar with the safety of shredder 1000 among corresponding Figure 10; Safety is touched and is stopped protection module 1155 and can 1160 come bio signal 1130 is made response and broken off the power supply of shredder motor 1190 in order control kneader bar 1120 quick and complete stopping through cutting off the electricity supply.In certain embodiments, touch by safety and stop the safety that protection module 1155 causes and stop aforesaid stop also being set to machine driven system 1195.Like the shredder among Figure 10 1000, touch by safety and to stop the safety that protection module 1155 causes and stop also can carrying out the rotator inertia that electrodynamic braking reduces kneader bar 1120.

Blade baffle plate 1111,1112 can improve the structural strength and the integrality of shredder 1100, and the product stability of enhancing is provided, the product service life of prolongation and minimizing running cost.Further, the baffle plate gap 1115 between blade baffle plate 1111,1112 can be adjusted on width, makes the said baffle plate gap 1115 can be roughly the same with the nearest corresponding (not shown) gap of shredder 1100 paper inlet openings.Baffle plate gap 1115 also can be set to the nearest corresponding (not shown) gap of shredder 1100 paper inlet openings about equally.In addition, it is narrow slightly that baffle plate gap 1115 can be set to the corresponding (not shown) gap more nearest than shredder 1100 paper inlet openings, and make the infringement material can not be admitted to blade 1120.Be narrower than slightly among the embodiment in the nearest corresponding (not shown) gap of shredder 1100 paper inlet openings in baffle plate gap 1115; Biology more likely before causes that at this biological contact kneader bar 1120 safety stops with the touch contact of the Metal Contact sensor 1111,1112 of biology sensor 1151.This arrangement even when the people directly detects shredder 1100 internal parts or is engaged in the engine 1100 of maintenance and test energising, also can strengthen the security of shredder 1100.

In other alternate embodiment, relevant safe arresting stop and the method for shredder 1100 among shredder 1000 and Figure 11 can be used separately or Combination application among described and Figure 10.In the 4th unrestricted example, biological and be electrically connected on the touch contact between the blade baffle plate 1111 of sensor 1150, can cause that safety is touched stops protection module 1155 and carries out safety and stop.In addition, this blade baffle plate embodiment of Figure 11 also can be used in combination with one or more how unrestricted example described in conjunction with Figure 10.In the 5th unrestricted example; Come from one or more hardwares or a metallization pad biological and framework 1010; And one or more blade baffle plates 1111 that can be electrically connected on sensor 1050 or 1150; 1112 contact causes safety to be touched stopping protection module 1055 or 1155 to carry out safety and stops.Further; Any aforesaid unrestricted example all can be modified so that by kneader bar 1020 or 1120; And one or more metal base structures, pad between metal blade, or the contact detection of blade baffle plate can cause that safety is touched and stops protection module and carry out safety such as unit 1055 or 1155 and stop.

In addition; Embodiments of the invention can provide a kind of cheapness, solution reliably and easily to potential danger and safety problem; Said potential danger and safety problem are caused by underlying cause: attempt to go into paper to paper inlet of paper shredder is excessive; Or the insertion of contingency an inappropriate object or a biological part, or attempt to clear up excessive go into paper or blockage.According to following explanation; Can understand some embodiment of the safe paper inlet device that is used for shredder; In addition, can realize that this device can comprise that also aforesaid touching stop responding to the security function assembly through the dielectric constant sensor that use is connected to paper inlet of paper shredder.

When a collection of pulverizing raw material was the inhomogeneous paper of a pile, it is complicated that the dielectric constant of this pulverizing material sample is confirmed to become, for example, because every paper can show specific density, moisture, the heavy or basis weight of paper; Because adjacent paper possibly be arranged to different with other; Also because surrounding environment comprises temperature humidity, all these can a kind of special mode influence special pulverizing raw material.In addition, when the dielectric constant of confirming a pile predetermined thickness paper was represented, the air gap can cause very big systematic uncertainty.Although sizable difference is arranged among a small circle, the dielectric constant range of representing the specific density scope roughly is confirmable.

Based on the purpose here, pulverize raw material and can be a kind of can be by the shredder material crushed, a collection of can be one or more parts of pulverizing raw material, can be and pulverizes raw materials quality and volume ratio and pulverize material density, and can be inserted layer correction by air.Pulverizing material density and a collection of pulverizing material density all can be substituted by DIELECTRIC CONSTANTS for every kind; ε is the macroscopic material performance of medium, and said medium can comprise the pulverizing raw material, and dielectric (flux) density D is connected with the electric field E relevant with said pulverizing raw material; That is, in fact:

$\mathrm{\ϵ}=\frac{D}{E}---\left(1\right)$

In particular, Figure 12 can analyze with a kind of Maxwell equation, promptly

Wherein D 1210 is motion vectors, and dA comprises extroversion (the vector table area of normal 1220 of V+ → V-), q 1230 are electric charges that the surperficial S1240 by sealing surrounds.Because can suppose desirable geometrical plane, the surface charge density on electrode V+ current potential can be considered uniformly, and is appointed as+σ 1250.One be designated as-the opposed surface electric charge of σ 1255 is present on the V-current potential on the electrode.Please note that what in this is analyzed, pay close attention to is potential difference rather than absolute potential.Because the part of a batch of material (like a piece of paper) has linear character usually, the relation between them:

D＝εE，(3)

It echoes the result of equation 1, it has been generally acknowledged that dielectric constant changes when running into different layers, and is of Figure 12.

Because used geometrical plane, said D and E vector field are mainly pointed to electrode plane and the vertical plane of pulverizing raw material layer.If as frame of broken lines 1270, vertical side is represented surface, A district so confining surface for we, the non-zero contribution to equation 2 integrations is the part of the vertical surface on right side then, and vertical surface place, said right side motion vector is got even value and is labeled as Di.Therefore, the area branch becomes

Di＝q＝σA，(4)

Or

Di＝σ(5)

Use equation 3 to the i layer, produce

Ei＝σ/ε(6)

And current potential V can be described to:

V＝-∫cE·dl (7)

Line integral starts from the V-electrode and ends at the V+ electrode here.

Usually, the function ε (ω) that dielectric constant can be used as frequency changes, but " dielectric constant " (appearance value) of here using also is called as " static relative dielectric constant (appearance value) ", i.e. ω among the ε (ω)=0.Usually, ε (0) _r" dielectric constant (the appearance value) " that also is called as material." the dielectric constant permittivity " that hereinafter mentions can be regarded as and " static relative dielectric constant (appearance value) ", and " dielectric constant dielectric constant " or k are identical.One of ordinary skill in the art knows that the dielectric constant (appearance value) of air (k) is approximately 1.0, the dielectric constant of some paper (appearance value) measured value between 1.5 to 6.0.Usually, the dielectric constant of material (appearance value) can see in product, promptly

∈＝∈o×∈r (8)

ε here ₀Be the dielectric constant (appearance value) of vacuum, its value is about 8.85 * 10 ^-12C ²/ N-m ²And

ε _rFor being filled in the relative dielectric constant (appearance value) of material in the dielectric constant detector gap (by the d representative).

Pulverize the relative dielectric constant (appearance value) of raw material for multilayer; Figure 12 also show total phsyical density in this " a pile " all individual elements the density summation (here; Vertically watch), and comprise and possibly be inserted into solid the air gap (for example, the 1a between the sheet that can mince; 1a+1, summation 1a+2).For ease, local length may be defined as

f _i＝l _i/e (9)

All there is a static relative dielectric constant ε each the air gap _Air=1, each insertion sheet (being assumed to paper) of pulverizing raw material can have one at 1.5＜ε _PaperStatic relative dielectric constant (appearance value) in＜6.0 scopes.In Figure 12, pulverizing material piece has static relative dielectric constant ε separately ₁, ε ₂... ε _i... ε _m, ε _n

The people who has the electrical engineering field to train general knowledge basically can understand the function that electric capacity is dielectric constant (appearance value); But dielectric constant is not the function of electric capacity.Therefore, the essential characteristic of dielectric constant is independent of the characteristic derived of electric capacity, and the dielectric constant sensor is not a capacitance sensor.Therefore, dielectric constant can be described to not reference capacitance, all is in order one of ordinary skill in the art to be simplified understand the principle of the embodiment of the invention but make any this reference.

Usually, in normal running,, safety cover plate makes an inlet that has gap-acceptance but can being opened.The gap of said sky (fills with air) representative has the volume of air of definite dielectric constant values ε.The material that gets into this gap is added in the electric field of crossing over this gap through change and changes dielectric constant (appearance value) measured value of crossing over this gap.For example, there is an initial dielectric constant values in a gap that comprises empty volume of air, and this dielectric constant values is with the dielectric constant values ε that measures for the first time ₁Represent.The instance in such gap can be the opening of paper inlet of paper shredder.When sheet-fed inserts paper inlet of paper shredder, through this gap, the DIELECTRIC CONSTANTS of (space+paper) of second measurement ₂The dielectric constant measurement value that possibly be different from empty gap.Similarly, have the dielectric constant values (appearance value) in the space of ten paper insertions to be quantified as the 3rd dielectric constant values that records (appearance value), its reflection has ten paper to insert the paper inlet gap.

In the unrestricted example based on dielectric constant formula shredder control system, shredder is set to ε when the dielectric constant values that records is between second dielectric constant measurement value and the 3rd dielectric constant measurement value ₁＜ε＜ε ₂Shi Qidong and shredded paper.Similarly, the dielectric constant values ε that records when shredder _sSurpassed predetermined dielectric constant maximum ε _MThe time can be configured such that shredder motor outage, do not carry out crushing operation.Replacedly, shredder is set to when the dielectric constant values that records is not in can operating the dielectric constant values scope, such as ε _S＜ε ₁, or ε _S＞ε ₂, crushing operation is not carried out in the outage of shredder motor.In addition, shredder can be set to as the dielectric constant values ε in exercisable dielectric constant range that records ₁＜ε _s＜ε ₂The time make shredder motor energising, and carry out crushing operation.As a unrestricted example, exercisable dielectric constant range can be in threshold epsilon ₁And threshold epsilon ₂Between, it can be represented between a piece of paper to ten paper.

Figure 13 A-C has demonstrated an alternative embodiment of dielectric constant sensing element and dielectric constant sensor.In Figure 13 A; Sensor 1300 can comprise two conductive plates 1305,1310, and they are arranged on the opposite face of long paper inlet of paper shredder opening 1320; This paper inlet opening is arranged in the shredder loam cake 1330, and loam cake 1300 can comprise that also paper inlet goes into paper passage 1325.Conductive plate 1305,1310 can be configured to access terminal with the bus of two adjacent vertical settings.Conductive plate 1305,1310 can be placed on " mouth " of long paper inlet of paper shredder 1320, or is placed on the relative position that paper inlet is gone into the paper passage, generally away from " mouth ".Conductive plate 1305,1310 can be formed by conductor exposed or half-naked dew, and said conductor can include but not limited to, foil or metal forming are although other conductive material also can be used.Conductive plate 1305,1310 can be connected to the lead-in wire 1307,1311 that corresponds to each other, and they can be connected to dielectric constant metering circuit 1315 through concussion element 1350.Conductive plate 1305 can be connected to the induction of signal portion of concussion element 1350 at anodal V+, and conductive plate 1310 can be inserted signal lead-V or ground connection.

In Figure 13 B, sensor 1333 can be made up of two cover conductive plates 1335,1340; Every suit 1335; 1340 represent a corresponding terminal relatively, and each termination set 1335,1340 vertically is arranged on the opposite face of long paper inlet of paper shredder opening 1320 in the shredder loam cake 1330.Generally speaking, a plurality of conductive plates on 1335 can be connected in first terminal, such as the V+ terminal usually.Similarly, generally speaking, a plurality of conductive plates on 1340 can be connected in second terminal usually, such as, V-terminal or ground connection.In certain embodiments, 1335 each plate that contains a plurality of conductive plates usually can be on 1340 conductive plate of electricity pairing separately. Conductive plate 1335,1340 can be connected to lead- in wire 1307,1311 separately, and above-mentioned lead-in wire can be connected to dielectric constant metering circuit 1315, and said dielectric constant metering circuit can comprise concussion element 1350.Conductive plate 1335 can be connected to 1350 induction of signal parts of concussion element V+ end, and conductive plate 1340 then can be connected to signal lead-V or ground connection.

In Figure 13 C, sensor 1370 can be made up of two or more conductive plate 1371-1375, and these conductive plates are arranged by predefined magnetic field sensor pattern.In addition, selected conductive plate, conductive plate 1371-1372 for example can partly or entirely be closed in the part of shredder loam cake 1330, such as, near long paper inlet of paper shredder opening 1320.In Figure 13 C, conductive plate 1371-1372 is illustrated as and is electrically connected and the formation conductive terminal, is the V+ terminal here.Similarly, conductive plate 1373-1375 is illustrated as and vertically is arranged on the shredder loam cake 1330, and near paper inlet opening 1320, and the relative position of corresponding conductive plate 1371-1372 forms V-or GND terminal.Conductive plate 1371-1372 and 1373-1375 can be connected to lead- in wire 1307,1311 separately, and these lead-in wires can be connected to dielectric constant metering circuit 1315 through concussion element 1350 again.Conductive plate 1371-1372 can be connected to the induction of signal part of concussion element 1350V+ end, and conductive plate 1373-1375 then is connected to signal lead-V or ground connection.

Figure 14 has described a shredder embodiment, and is symbolistic by 1400 representatives, comprises dielectric constant response type shredder control system 1425.Shredder control system 1425 can comprise dielectric constant signal condition system 1435; This signal condition system can comprise again and is connected in dielectric constant sensing element 1402; 1403 dielectric constant sensor 1410 and be connected in the dielectric constant threshold module 1430 of dielectric constant sensor 1410.Dielectric constant control system 1425 also can be connected to shredder motor 1460.Dielectric constant sensing element 1402,1403 setting is used for responding to dielectric constant, or the variation of dielectric constant near certain zone of dielectric constant sensing element 1402,1403.Usually, electric field 1420 can be arranged between the dielectric constant sensing element 1402,1403.Sensing element 1402,1403 response applies the upset of electric field 1420, and this can be caused by the variation of the localized area dielectric constant of the sensing unit between 1402,1403.Understand and to use a variety of dielectric constant sensors and dielectric constant sensing element that an example of sensor and sensing element can be the dielectric constant sensor that contains the parallel electrically conductive panel element that at least two branches are arranged although be proficient in those skilled in the art.When electric charge is added to 1402,1403 last times of conductive plate, form the characteristic dielectric constant that inserts material between the conductive plates 1402,1403 at electric field 1420.When the material that contains differing dielectric constant was inserted between the conductive plate 1402,1403, electric field 1420 was corresponding to influence that contains magnetic field of dielectric constant difference experience of said insertion material.The dielectric constant signal 1412 of induction is drawn in this influence on conductive plate 1402,1403, said conductive plate inserts dielectric constant sensor 1410.Said influence can excite shredder controller 1440, or photo-sensitive cell 1490 can excite shredder controller 1440.

Dielectric constant sensor 1410 can receive, and amplifies, and filters, or quantizes the dielectric constant signal 1412 sensed, generates the dielectric constant signal 1427 of modulation.Amplification can include but not limited to that curtage amplifies or stabilisation.Filtration can include but not limited to, signal levelling and noise reduction.Quantification can comprise corresponding to the dielectric constant signal of sensing 1412 for modulating integer value of dielectric constant signal 1427 generations.Dielectric constant threshold module 1430 can be analyzed modulation dielectric constant signal 1427 and decide the threshold value of modulation signal 1427 whether to surpass predetermined occlusion threshold.Replacedly; Dielectric constant threshold module 1430 can determine to modulate dielectric constant signal 1427 whether in predetermined crushing operation scope; Whether signal 1427 is on predetermined crushing operation scope, or signal 1427 at least one in these several problems under predetermined crushing operation scope whether.In response to the dielectric constant condition of induction by 1427 representatives, shredder control system 1425 optionally makes motor 1460 energisings or outage.Shredder control system 1425 also can make motor 1460 energisings carry out forward or reverse.

Forward Figure 15 to, an instance of oscillating circuit 1500 is similar to the concussion element of describing among Figure 14 1450.Oscillating circuit 1500 can receive from the input of the difference of input lead 1505,1510, and the there has the electricity of the dielectric constant values that representative measures in sensor 1570 poor.Said difference input can be reflected as the discernible concussion numerical value through the interaction decision of input lead 1505,1510.The oscillating circuit 1500 regularly dielectric constant values of detecting sensor measures 1515, and can import the variation of measured value 1515 into control circuit 1525.Oscillating circuit 1500 can be configured to the centrifugal pump of Measuring Dielectric Constant, or is configured to discern at least a predetermined dielectric constant threshold value.In addition, the dielectric constant sensor 1570 that comprises exposed V+ sensing element also can be used as to touch and stops controlling the sensor use, and the safety of wherein describing among Fig. 9 stops to carry out from the induced electricity detection contact of biology through induction.

Figure 16 has showed an embodiment 1600 of shredder, and it can be controlled based on dielectric constant formula shredder controller 1650.Shredder 1600 can combine the element and the circuit of the description relevant with Fig. 1-15.Usually, shredder 1600 comprises the paper inlet opening 1610 that has combined to go into paper gap 1625, is used to hold pulverize raw material 1630, such as paper.In certain embodiments; Because the change in dielectric constant that the empty paper inlet opening 1610 of a piece of paper insertion causes can be by two or more dielectric constant sensing elements 1660; 1661 detect; These sensing elements produce enough dielectric constant output signals 1618, and this signal causes based on dielectric constant formula shredder controller 1650 and starts crushing operation through driving dynamo-electric paper shredder 1635.Dynamo-electric paper shredder 1635 can comprise shredder motor and kneader bar.Replacedly, paper inlet opening 1610 can be provided with infrared sensor 1675, and with top similar, when sensor 1610 detected object in paper inlet gap 1625, this sensor 1675 can be controlled the shredded paper operation.

According to explanation here, Figure 17 is based on the sketch map of a dielectric constant formula shredder control embodiment 1700 of system.Control system 1700 comprises dielectric constant detector 1710, shredder controller (MPU) 1715 and shredder motor controller 1720.Shredder motor controller 1720 can be connected to shredder motor 1725, and can be mechanically attached to several kneader bar (not shown) in order.Control system 1700 can comprise positioning indicator, for example, indicator lamp group 1730, it provides the visual indication of shredder state.In addition, control system 1700 can be connected to one or more multisensor or control element influence the shredder function.Such sensor or control element can provide security function, and it can protect shredder or user to avoid injury.The example of said sensor or control element can include but not limited to, dielectric constant detector 1710, and power switch (POWER SW), waste-basket door status switch (DOOR SW), or waste-basket has been expired (JP6 SENSOR).MPU 1715 provides detection according to the function treatment software that a programmable program is integrated on the MPU1715 to shredder, and operation is analyzed, indication or control function.The suitable example of MPU1715 can be the PIC16F67720-pin, 8 CMOS microcontrollers of integrated flash memory formula internal memory, and by little core scientific & technical corporation, U.S. Qian Dele, AZ (Microchip Technology Inc., Chandler, AZ USA) produces.The example of said PIC16F677 specification and running can find databook at PIC16F631/677/685/687/689/690: based on 20 pins of flash memory, adopt 8 CMOS microcontrollers of nanowatt technology; DOC. number DS41262E; Little core scientific & technical corporation, Qian De reins in AZ, and 2008; At URL:http: //ww1.microchip.com/downloads/en/DeviceDoc/41262E.pdf is effective on February 2nd, 2011, and data list file is all included this integral body in here.

Other microcontroller also can be used, and can be substituted by other ordinary skill of this area.Such as, dielectric constant detector output signal can be received the input RA5 of MPU1715, for identification equipment, also can be designated as pin TICKI.Pin TICKI is connected to concussion dielectric constant detector output signal 1702, and MPU1715 can comprise timer or counter function.

When the dielectric constant status signal is connected to the pin TICKI such as the OUT pin 3 to MPU 1715 of the oscillating circuit from Figure 15 1510, MPU 1715 predetermined detection in the phase through increasing progressively each periodic vibration of numeric counter of holding by MPU counter T1.MPU timer T0 is the detection period that is predetermined.In the said detection period that is predetermined, the amplitude of counter T1 sign dielectric constant modulation signal be the number of the periodic vibration of calculating during this period.The number of periodic vibration can be by the MPU1715 record, and the numerical value of MPU counter T1 can be reset initial into by during the predetermined monitoring of the next one of MPU timer T0 metering afterwards.Usually, the periodic vibration number is directly proportional with the amplitude of dielectric constant modulation signal, as relates to the concussion cycle T.Among the selected herein embodiment, the suitable predetermined detection phase approximately can be 0.065536 second (or 65.536 microseconds).

MPU1715 also can enroll the instruction of microcontroller, when selected instruction based on MPU when MPU1715 carries out, and when this instruction is performed among the MPU1715, enforcement comprises the main program of at least one subprogram.

In a unrestricted embodiment 1700 of the concussion element that is used in shredder control system, oscillating circuit 1705 can comprise unstable state multi resonant oscillator/timer, NE555 timer for example, it can with executive component R14, R15 and C8 form function circuit jointly.One of ordinary skill in the art can recognize, when the R14 resistance value is 10 kilo-ohms, the R15 resistance value is 47 kilo-ohms, and when the capacitance of C8 was 33 nanofarads, oscillating circuit 1705 issued a signal to control circuit 1715, and this signal can be the representative of the dielectric constant values of measurement.Control circuit 1715 can cooperate oscillating circuit 1705 to keep regular accurately dielectric constant measurement.One of ordinary skill in the art can recognize that the cycle T of oscillator 1700 can be estimated through following formula:

$T\≈0.7(R14+2\×R15)\×\frac{\mathrm{\ϵA}}{d}---\left(10\right)$

Wherein, T is the concussion cycle of oscillating circuit 1700;

R14 is the resistance value of resistance R 14;

R15 is the resistance value of resistance R 15;

A is the overlay region of relative hardware;

D is the distance between the overlapped metal element;

ε is a dielectric constant.

Certainly, R14, R15, A and d can remain almost fixed.Therefore, the oscillator signal cycle T of oscillating circuit 1705 changes with the variation by the DIELECTRIC CONSTANTS between the overlay region A that divides the relative hardware of opening apart from d.Final right-hand rule in the equation 1 can be got in touch with electric capacity, has the people of foundation training can understand the function that electric capacity is dielectric constant in the electrical engineering field, and dielectric constant and electric capacity are irrelevant.Therefore, the performance of deriving of the essential characteristic of dielectric constant and electric capacity is irrelevant, and the dielectric constant sensor is not a capacitance sensor.Therefore, the dielectric constant here can be described to not reference capacitance, but makes any simplification with reference to all being general personnel's understanding of being convenient to this area for the principle that makes present embodiment.

In 1700 embodiment of Figure 17 system, R14 is 10 kilo-ohms a resistance, and R15 is 47 kilo-ohms a resistance, although other numerical value also can be used.In an embodiment of paper inlet opening sensor configuration, the common region S of the parallel-plate of sensor 1701 is about 8.2 * 10 ^-3m ², and be about 3.0 * 10 apart from d between the plate ^-3M.

T≈201，899×ε _r (11)

Obviously, the concussion cycle T is the function of dielectric constant.Therefore, introduce the variation ε of the relative dielectric constant of material on sensor of paper inlet of paper shredder opening _rCan be reflected as the variation of the concussion cycle T of oscillating circuit 1705.

When one or when more plurality of sheets of paper is introduced among the air gap d of paper inlet of paper shredder; Variation has all taken place in the content of the air gap d on the width in gap and dielectric constant, therefore have at least two dielectric materials that contain different value separately to be placed between the two or more condenser armatures that contain total region S.In this inhomogenous dielectric environment, first kind of dielectric material (such as air) includes DIELECTRIC CONSTANTS _AIRWith thickness m _AIR, and second kind of dielectric material (such as one or more paper) includes DIELECTRIC CONSTANTS _PAPERWith thickness m _PAPER

The cycle T of oscillating circuit 1705, as the function of dielectric constant and material thickness:

$T\≈0.7(R14+2\×R15)\×\frac{S{\mathrm{\ϵ}}_{\mathrm{AIR}}{\mathrm{\ϵ}}_{\mathrm{PAPER}2}}{m_{\mathrm{AIR}}{\mathrm{\ϵ}}_{\mathrm{PAPER}}+m_{\mathrm{PAPER}}{\mathrm{\ϵ}}_{\mathrm{AIR}}}---\left(12\right)$

The influence of capacitor C is left in the basket, and is not used in the detection dielectric constant.In the embodiment of the oscillating circuit 1705 of Figure 17, R14 is 10 kilo-ohms a resistance, and R15 is 47 kilo-ohms a resistance, although other numerical value also possibly be used.In the configuration of paper inlet opening sensor, the common region of parallel-plate can be about 8.2 * 10 ^-3m ², equation 12 can be reduced to

$T=605.7\&times;\frac{{\mathrm{\&epsiv;}}_1{\mathrm{\&epsiv;}}_2}{{\mathrm{<figure-callout\; id="1"\; label="T"\; filenames="111129170802.png,111129170830.png"\; state="\{\{state\}\}">T</figure-callout>}}_1{\mathrm{\&epsiv;}}_2+{\mathrm{<figure-callout\; id="2"\; label="T"\; filenames="111129170830.png,111129170833.png"\; state="\{\{state\}\}">T</figure-callout>}}_2{\mathrm{\&epsiv;}}_1}---\left(13\right)$

Again, the influence of capacitor C is left in the basket.Obviously, equation 11-16 can represent the improvement of the model of the air/combination of media that may be run into by shredder.Even so, we find the symbol of the example of the non-uniform dielectric selected (like, paper+air) as respective threshold, can simplify paper sheet thickness and detect and use cheap assembly just enough.

Table 1 has been demonstrated the empirical result that obtains through prototype.

Table 1

The number of paper	Dielectric constant	Δε
			Do not have (0)	ε≈1.465F/m	N/A
One (1)	ε≈1.506F/m	0.041F/m
			Ten (10)	ε≈1.872F/m	0.407F/m

Table 1 shows the dielectric constant threshold value that records with dielectric constant detector 1770 between discernible threshold value, and this discernible threshold value transmits a signal to shredder control system 1715 and accomplishes startup, does not does not start or stop the operation of pulverizing.The variation of predetermined threshold dielectric constant during with the contrast of the starting point (initial value) made by oneself can be avoided more complicated model through response, and to the value of other variable, can be left in the basket like the dependence of C, if any.

When a conductive plate like 1505 among Figure 15 was contacted with biophysics by exposed permission, dielectric constant detector 1710 also can provide the security mechanism of touch sensible.Biology sends induced electricity or electrical signal of reaction, and this signal can be used to the operation of control system 1700.This physics contact may make things convenient for induced electricity to transmit from biology, and is connected to shredder logic control system 1715.To this reaction, motor controller can make the shredder outage or carry out safety and stop.

Figure 18 has described a kind of another embodiment 1800 based on dielectric constant formula shredder, and it comprises starting switch 1810 and protection timer 1850.Under such configuration, starting switch 1810 can use in the position of power switch, and can unite timer 1850 operations the shredder power supply is in out, the state of standby or pass.Said holding state definable at a preset time at interval; Protect at interval the timer 1850 can measurement count at this preset time, or count down and define the predetermined fixed point time interval, shredder 1800 can be closed after this; And motor 1830 is de-energized, or suspends.A collection of through introducing in the predetermined former preliminary election part of pulverizing between former charge density region of expecting paper inlet of paper shredder opening (not shown) of pulverizing; Dielectric constant sensor 1825 can receive or detect a collection of pulverizing raw material, and can cause 1830 energisings of shredder motor and operate.1830 energisings of shredder motor can cause timer 1850 in interval operation scheduled operating time, and shredder 1800 can keep holding state in said predetermined time interval.In this time interval, dielectric constant sensor 1825 can restart 1830 pairs of a collection of pulverizing raw materials of electro-motor and pulverize.Yet, the predetermined fixed point time interval such as 5 minutes after, power supply can break off from electro-motor 1830 or logic controller 1820 or both.Make the electrical equipment of shredder 1800 turn back to the open/stand state, starting switch 1810 can be removed by the pass/disabled position from it.

When extra pulverizing raw material was placed into shredder, starting switch 1810 also can be used for restarting pulverizing.Indicator 1880 can be indicated the not pulverizing material density in predetermined dielectric constant range of a collection of dielectric constant values, such as the obstruction at initial stage, and inappropriate pulverizing raw material, perhaps biological.Indicator 1885 can be used for indicating the condition of the overheated or overload of shredder motor 1830.Even do not consider start-up technique, the unsuitable dielectric constant measurement value of using dielectric constant sensing element 1825 to confirm, it is blocked up to can be used for directing object, or is not suitable for pulverizing, and causes control system 1875 with dynamo-electric paper shredder 1830 outages.In certain embodiments, control system 1875 can stop dynamo-electric paper shredder 1830, or causes dynamo-electric paper shredder 1830 reverse operatings to be used to make to mince withdrawing from kneader bar, stops using then and stops dynamo-electric paper shredder 1830.Stop like the described safety of Fig. 9, can be caused by dielectric constant formula shredder controller 1875 owing to the object of being sensed by dielectric constant sensor element 1825.With paper be representative the pulverizing object for example, when the number of paper of introducing paper inlet produces when surpassing predetermined excessive dielectric constant of going into the paper threshold value, the control system will make motor that overload or blocked state are made a response.An example of the object that is not suitable for pulverizing can be a biological part.

Figure 19 has described an a kind of embodiment 1900 of dielectric constant formula shredder, and it comprises starting switch 1910 and fixed point timer 1950.In certain embodiments, starting switch 1910 can be used as power supply open/stand switch and uses, and can be set at the paper inlet of paper shredder opening.Shredder 1900 can use power switch 1960 and be used for power supply together with starting switch 1910.Power switch 1960 can be used to the electrical equipment power supply of shredder 1300 is opened or closed.In first position of starting switch 1910, the shredder electrical equipment is the shredder motor for example, and logic controller or both can be set to holding state.When a collection of pulverizing raw material was introduced into the paper inlet of paper shredder opening, starting switch 1910 can be moved to second position of fixed point switch.On second position, starting switch 1910 can activate dielectric constant sensor 1925, and power supply is connected to shredder motor 1930, shredder controller 1920 and fixed point timer 1950.Overload logic device 1975 can determine the existence of overload and activate overload indicator 1980.In addition, overload logic device 1975 can detect the overheated or blocked state of motor and can excite overheat indicator 1985.

A unrestricted example of suitable procedure or subprocess is seen Figure 20-34, and the narration relevant with each term diagram.Main program can be connected at least one subprogram.One 2000 of the embodiment of main program (Figure 20) can carry out a sub-subroutine process, at least according to present embodiment; Can include but not limited to " initialization " subprogram 2100 (Figure 21), " door is opened " subprogram 2200 (Figure 22); " overtemperature protection " subprogram 2300 (Figure 23), " threshold value setting " subprogram 2400 (Figure 24), " machine overload " subprogram 2500 (Figure 25); " manually move back paper " subprogram 2600 (Figure 26), " machine paperboard " subprogram 2700 (Figure 27), " manually going into paper " subprogram 2800 (Figure 28); " paper is full " subprogram 3200 (Figure 32), " self-lock protection " subprogram 2900 (Figure 29), " paper feed automatically " subprogram 3000 (Figure 30); " time-delay paper feed " subprogram 3100 (Figure 31), " dielectric constant is unusual " subprogram 3300 (Figure 33), or " touch and stop protection " subprogram 3400 (Figure 34).The order that above-mentioned these subprograms are enumerated only is used for explaining but not functional specification.As use, indicator can be visual detector (like indicator lamp), audio indicator (like buzzer), or audiovisual indicator (such as the figure indicator lamp of band sounding clock). here

Figure 20 has demonstrated the shredder operation, like shredder described herein, main logic flow.One or more aforesaid subprograms can be performed with main logic flow, include but not limited to, " dielectric constant is unusual " subprogram is like subprogram 3300 (Figure 33).

When the shredder electric power starting, can use " initialization " subprogram 2100, data and status information can be initialised." threshold value setting " subprogram 2400 is provided with the operation and the parameter of the functional status of system and sets.When operation that reaches demarcation or parameter value, will get into the systemic-function state.If the trigger point of definition shredder function is not provided with, system mode is marked as, and is used to be provided with use and do not limit " threshold value setting " subprogram 2400 (Figure 24).After the initialization, the control of shredder function can turn back to shredder control system.

Another subprogram example, in " door is opened " subprogram 2200 (Figure 22), the door on shredder is opened indicator lamp and can be transferred to open, and closes up to door.Yet if use like this, can surpass permanent setting shredder function in 3 seconds by moving back paper (shredder direction) key, this can once indicate through all indicator lamps are dodged, although other indicating means is also available.Another subprogram instance can come illustration through " overtemperature protection " subprogram 2300 (Figure 23).In subprogram 2300, it is variable bright that motor is crossed thermal light, and the shredder motor is de-energized, up to the open the door malfunction (and most likely seeking the overheated reason of motor) of inspection illustration of shredder operator.When door is opened and then closes, cross thermal light and extinguish, get into main program.

" threshold value setting " subprogram 2400 (Figure 24) can be used to, and for example, for threshold value is set minimum and maximum value, said threshold value can be that for example motor is overheated, motor overload, and dielectric constant, the automatic or manual function, indicator uses, or the delay of warning before being triggered.Operation and parameter setting up to the systemic-function state are provided with this pattern, and what the user just can repeat visits the systemic-function state value.Therefore, " threshold value setting " subprogram 2400 can be by manufacturer, and foundry and supplier use, and can before shredder being provided to the terminal use, set.If necessary, " threshold value setting " subprogram 2400 also can be used to remove and reset threshold function.For example, the value of " test " can be designated as the mean value of incipient machine paperboard.Set max-thresholds through introducing the selected pulverizing raw material number of plies (and composition) to the dielectric constant sensor that paper inlet is gone into the paper passage, the maximum of pulverizing raw material can be set.Likewise, the minimum of a value of the pulverizing raw material number of plies (and composition) can be transfused to and set.Different table between these values is clear just can be by the maximum of the pulverizing raw material of shredder pulverizing before obstruction.This is that shredder of the present invention can be used in fact a kind of method of " anti-blocking year ".After " threshold value setting " subprogram 2400 was accomplished, said shredder function turned back to main program 2000.Open if door takes place, motor is overheated, or shredder is overheated, and " threshold value setting " subprogram will withdraw from and control is turned back to main program 2000.

" machine overload " subprogram 2500 (Figure 25) can be used for discerning the shredder overload situations, through opening indicator lamp and motor counter-rotating (with respect to normal pulverizing behavior) being reacted in about 2.5 seconds.If other malfunction is opened such as door, machine is overheated, plug paper, and the full pattern of manual paper feeding pattern or paper takes place, and then one or more time-delay paper feed flag bits are set, and overload light goes out, and main program 2000 is returned in control.If shredder is operated with automatic paper feed pattern, the self-lock protection state is marked and controls returns main program 2000.

Subprogram 2600 (Figure 26) can be started by the shredder user " manually to move back paper ", for example, through by " moving back paper " (or counter-rotating) key, causes that the shredder motor is to rotating with the normal running rightabout.Subprogram can be used as the alarm of potential potential safety hazard " manually to move back paper ", and when door is opened, the overheated or shredder of motor stops motor during with " manual paper feeding " pattern (like the subprogram 2800 in 28) operation.But, be released if move back the paper control device, if shredder is in " manually moving back paper " pattern, like about 2 seconds, perhaps in " paper feed automatically " pattern (subprogram 3000 in like Figure 30), the shredder motor can not be closed shredder.In " machine paperboard " subprogram 2700, flicker (or the intermittent) indicator lamp of identification overload is bright, or opens when door, goes out during the overheated or cleaning machine paperboard of shredder motor.

It is motor operated that " manual paper feeding " subprogram 2800 can start shredder, and the shredder motor rotates with normal (pulverizing) direction.But; If the shredded paper gate is opened, or motor is overheated, or shredder is received " moving back paper " execution signal; Or there is the machine paperboard to take place; Or shredder machine overload, or the shredder operation is more than under 5 seconds the situation, and " manual paper feeding " subprogram 2800 can withdraw from and shredder motor outage (and stopping).If under " paper feed automatically " pattern (subprogram 3000 among Figure 30), the shredder waste-basket is full simultaneously, motor also can cut off the power supply and stop normal rotation.Otherwise control can be back to main program 2000.Shredder waste-basket or container comprise the finite volume that can hold the pulverizing material of having pulverized, and therefore, " paper is full " subprogram 3200 can respond full waste-basket through " full " indication is provided therein.The shredded paper operation can continue.Still can detect by device to be detected if under obstruction or overload condition, pulverize paper material, subprogram " self-lock protection " 2900 activates." self-lock protection " the 2900th, if a kind of selected malfunction (like overload) continues, shredder keeps inactive behavior.But, if " dielectric constant is unusual " (subprogram 3300 Figure 33) is received, and for example the shredder motor is overheated; Perhaps touch stop protecting bio signal produce (subprogram 3400, Figure 34), perhaps shredder is in " manually moving back paper " pattern, perhaps shredder machine paperboard; Perhaps shredder is placed into " manual paper feeding " pattern, and perhaps the shredder waste-basket is no longer full, and the full indicator lamp of said paper extinguishes; System turns back to main subprogram, if having there malfunction exist (such as, the shredder motor is overheated); Corresponding subprogram will be handled malfunction separately, for example, and through making the outage of shredder motor.

In " paper feed automatically " subprogram 3000, introducing an amount of paper behind paper inlet, shredder will start automatically, begin normal revolution.But shown in figure 29, under the situation of nonserviceabling, revolution stops, and main program 2000 is returned in control.In " time-delay paper feed " subprogram 3100, the shredder motor will start, such as, after the delay in 2.5 seconds of printer cleaning overload.In " paper is full " subprogram 3200, " waste-basket is full " that detected by the shredder control circuit starts indicator, such as " the paper bucket is full " indicator lamp.In case the paper bucket is lower than the minimum point of " expiring " by clearing up, said " the paper bucket is full " indicator lamp can extinguish, and main program 2000 is returned in control.In " dielectric constant is unusual " subprogram 3300, if a dielectric constant that breaks bounds is detected, the shredder motor will stop operating, and indicator lamp glimmers always and is eliminated to this situation; After indicator lamp goes out, motor restart and be ready to the running.In " touch and stop protection " subprogram 3400, motor outage dual mode at least takes place.At first, if any touch sensor is received the induced electricity from biology, sensor transfers the induced electricity of receiving to bio signal, and this bio signal can be used for starting " touch and stop protection " indicator lamp by controller and make the outage of shredder motor.Secondly, if in the paper feed process, detected dielectric constant values surpasses the upper limit of dielectric constant, and hypothesis has touch then, and this touches and produces bio signal, and this signal is used for starting " touch and stop protection " indicator lamp and makes the outage of shredder motor by controller.In case this situation is eliminated, main program 2000 is promptly returned in control.

Above-mentioned safety element to be combined under the present explanation one of ordinary skill in the art be conspicuous.

Beneficial effect:

Embodiments of the invention provide following useful purposes:

1. improve the security of product, comprise the adult, children and pet for biology.

2. improve the support structure of shredder integral member.

3. improve the structural intergrity of shredder.

4. enhancing product reliability.

5. prolong product service life.

6. reduce the running cost and the maintenance of product.

Detail like preceding text, saidly adopted series circuit based on dielectric constant formula shredder control system.Go into the paper passage at the machine paper inlet and be provided with blade and touch stop sensor, this sensor is connected to the touch-control control circuit, the earthed switch circuit, and safety is touched and is stopped protection module, and the shredder movement that comprises the blade stop.Safety when these all circuit have guaranteed people or other biological touch based on dielectric constant formula kneader bar.Electricity from human body causes said touch-control control circuit, and then causes the circuit that all are attached thereto.Thereby said safety is touched and is stopped the safety that protection module forbidding shredder movement has been guaranteed the people.If when someone contacts dielectric constant formula kneader bar, even electric power starting, the shredder movement still can not turn round.As aforesaid dielectric constant formula panel, shredder can use the real-time monitoring that realizes the accurate control procedure of safety based on dielectric constant formula kneader bar.The performance of machine is reliable and stable.It can also be operated when nobody gets involved easily, can be applicable to situation widely, and can bring safety assurance.Similarly, when when the detected pulverizing raw material of paper inlet of paper shredder dielectric constant is in predetermined dielectric constant range, dielectric constant formula shredder can turn round, and when a value was defined in outside this scope, it can indicate " dielectric constant is unusual ".The induction-assisted reduction shredder of dielectric constant stops up, and the shredder motor is overheated, or the possibility of shredder motor overload, through reducing the life-span that these stress risers prolong shredder.By accident, dielectric constant induction also can produce the dielectric constant exceptional value owing to the dielectric constant of biology and carries out to touch and stop defencive function.One of ordinary skill in the art can be recognized foreseeable modification and replacement in view of above-mentioned disclosure.

Although the present invention specifically describes with by way of example, be appreciated that no matter be that specification or accompanying drawing all are not used in restriction.To those skilled in the art, read the disclosure of front when them after, various replacements or modification are conspicuous.Claims of appendix are interpreted as and can cover all and comprise within the spirit and scope of the present invention replacement and modification.Therefore, only if these changes and modification depart from scope of the present invention, they should be interpreted as and be included in wherein.

Claims (25)

1. shredder safety guard that is used on the shredder, said shredder comprises and is used to receive the paper inlet that can mince, and this shredder safety guard comprises:

Be arranged on the starting switch of paper inlet, and be configured to make when contacting with said starting switch the electrical equipment energising of said shredder when mincing;

The dielectric constant sensor; It is configured to receive the electric energy that is provided; Wherein said dielectric constant sensor produces appearance value induction zone, and said dielectric constant sensor causes to mince and pulverized in the time can mincing the medium that has changed said dielectric constant induction zone in appearance value induction zone;

With

Timer is activated by said starting switch, and wherein timer is configured to be electrically connected with the electrical equipment of shredder, and wherein said timer is set to after preset delay time arrives, and makes the electrical equipment deenergization of shredder.

2. shredder safety guard as claimed in claim 1 further comprises:

Induced electricity cuts off switch, is configured to detect the voltage from the biology that contacts with the preset element of said shredder, and is set to when contacting with said biology, can make timer skip preset delay time, shows the matured time.

3. shredder safety guard as claimed in claim 1 further comprises:

Be connected the master board on the said dielectric constant sensor, when said master board received that mincing of dielectric constant sensor changed the indication of appearance value induction zone, said master board caused the pulverizing of can mincing.

4. shredder safety guard as claimed in claim 3 further comprises:

Electro-motor, it is connected between said dielectric constant sensor and the said master board, and is configured to electro-motor when energising, begins the pulverizing that can mince, when electro-motor cuts off the power supply, stops the pulverizing can to mince.

5. a shredder is controlled system, comprising:

Conduction shredder element;

Kneader bar;

The shredder movement is connected on the said kneader bar, and is set to stop said kneader bar;

Be connected the control module on the said conduction shredder element; It can detect from the biological response on said conduction shredder element electricity, and said control module is connected on the said shredder movement and the induced electricity that is configured to respond detection stops said kneader bar;

Go into the paper passage, be positioned near the said shredder movement,

With

The dielectric constant sensor; Be arranged on saidly to go in the paper passage; And being connected in said control module, wherein said dielectric constant sensor cooperates response to be inserted into the material of presetting the appearance value into surpassing of paper passage and the running that stops said kneader bar together with said control module.

6. shredder as claimed in claim 5 is controlled system, and wherein said shredder movement further comprises the mechanical stop that includes clutch.

7. shredder as claimed in claim 5 is controlled system, further comprises:

Electromagnetic motor, it is connected on said shredder movement and the said kneader bar, and wherein revolution drives the kneader bar rotation; With

The electromagnetic braking circuit, the control module of access motor, wherein said control module is configured to cause the motor electromagnetic braking,

With

Wherein said control module is to the real-time monitoring that essence is provided that contacts between said conduction shredder element and the biology, and biological the contact with said conduction shredder element of wherein said control module response causes the motor electromagnetic braking.

8. shredder as claimed in claim 5 is controlled system, wherein:

Said shredder movement comprises the shredder motor that can reverse;

Said control module comprises three sections switches, and it comprises open and close and reverse three positions;

And said three sections switches are when position of opening or reverse position, and said control module can be operated the said shredder motor that reverses can not be started.

9. shredder as claimed in claim 5 is controlled system, wherein:

The said shredder motor that reverses is controlled by relay switch.

10. shredder as claimed in claim 5 is controlled system, and wherein said induced electricity is a kind of by said biogenic electrostatic charge.

11. shredder as claimed in claim 5 is controlled system, wherein said induced electricity is a kind of by said biogenic mobile charge.

12. a shredder system comprises:

The shredder motor;

Kneader bar;

The touch-control control circuit is connected on the said kneader bar;

Biology sensor is connected on the said touch-control control circuit, and response is received from biological induced electricity;

The shredder control module is connected between said touch-control control circuit and the said shredder motor; With

The dielectric constant controller is connected on the said shredder control module, and cooperates said shredder control module before the material that contains preset dielectric constant values is pulverized by said kneader bar, to stop said shredder motor,

When affacting said biology sensor when the biological contact of generation and induced electricity, wherein said touch-control control circuit cooperates said shredder control module to stop the running of shredder motor.

13. as claimed in claim 12 based on dielectric constant formula shredder system, further comprise:

Photo-coupler; Be inserted in the electrical path between said biology sensor and the said shredder control module shredder motor that wherein is coupled and impels said shredder control module to stop to move through photo-coupler from the electrical signal of reaction of said touch-control control circuit.

14. it is as claimed in claim 13 based on dielectric constant formula shredder system; Further comprise the earthed switch circuit that is connected in said photo-coupler; This circuit will be transferred to said photo-coupler from the electrical signal of reaction that said touch-control control circuit is received, wherein said earthed switch circuit will be coupled to said photo-coupler from the electrical signal of reaction of said touch-control control circuit.

15. as claimed in claim 14 based on dielectric constant formula shredder system, wherein said touch-control control circuit further comprises:

Previous stage triode, its base stage are connected on the said biology sensor, and its colelctor electrode is connected on the power supply, and its emitter stage is connected on the base stage of back one-level triode, and the emitter stage of wherein said back one-level triode is connected to the input of photo-coupler.

16. as claimed in claim 12 based on dielectric constant formula shredder system, wherein said electrical signal of reaction is a kind of by said biogenic electrostatic charge.

17. as claimed in claim 12 based on dielectric constant formula shredder system, wherein said electrical signal of reaction is a kind of by said biogenic mobile charge.

18. a shredder system comprises:

Kneader bar;

The shredder motor of can supplying power is connected on the said kneader bar;

The dielectric constant sensor is connected on the said shredder motor, and is configured to respond the said shredder motor of supplying power of minced startup in predetermined appearance value scope of reception;

Timer is connected between said dielectric constant sensor and the said motor, is configured to the said shredder motor of supplying power of behind the lay-up period that a said shredder motor of supplying power is scheduled to, stopping using;

Biology sensor, the induced electricity that response comes from the biology that has bio signal;

Safety is touched and is stopped protection module, comprises the gauge tap that is connected on the said motor of supplying power; With

The photodetachment device; It is connected in and receives the bio signal of said biology sensor and be configured to electricity and isolates said bio signal and be sent to said safety and touch and stop protection module; Wherein, When shredder moved, said bio signal impelled said safety to touch and stops the running that protection module operation gauge tap stops the said shredder motor of supplying power, and wherein said gauge tap is a magnetic reed switch.

19. as claimed in claim 18 based on dielectric constant formula shredder system, be a kind of in electrostatic charge or the mobile charge wherein by said biogenic electrical signal of reaction.

20. one kind with the method based on dielectric constant formula Equipment Control shredder, comprising:

The shredder that can supply power motor is provided, and said motor can be operating as forward or reverse;

Kneader bar is provided, can be driven by said shredder motor of supplying power;

Connect the dielectric constant sensor to said shredder element, wherein said dielectric constant sensor can be switched on by the electrical signal of reaction of biology;

The control circuit that is connected in said dielectric constant sensor is provided, is configured to receive the bio signal of representing electrical signal of reaction; And

Dispose said control circuit and respond said dielectric constant sensor and the biological running that contacts the supplied power shredder motor that stops said forward or reverse.

21. the method for control shredder as claimed in claim 20 further comprises:

Between said dielectric constant sensor and voltage, provide electricity to isolate one or two in wherein said voltage-operated said control circuit and the said shredder motor of supplying power.

22. a shredder security system comprises:

Kneader bar;

Reversible shredder motor of can supplying power is connected on the said kneader bar;

Safety control circuit is connected on said reversible shredder motor of supplying power;

The earthed switch circuit is connected on the said safety control circuit;

The touch-control control circuit; Be connected on the said safety control circuit; And comprise the dielectric constant sensor; Wherein when the electrical signal of reaction from the biology that contacts with said dielectric constant sensor was detected, said safety control circuit response ground drove said earthed switch circuit and stops said reversible shredder motor of supplying power.

23. shredder security system as claimed in claim 22 further comprises:

Safety switch; It comprises electric member that is connected on the said safety control circuit and the mechanical component that is connected shredder cabinet coupling part near-end and matches; Wherein when the cooperation multilated of said mechanical component and said coupling part said electric member TRANSEC transmission security switching signal to said safety control circuit; And said safety control circuit is launched the running that said control circuit stops said reversible shredder motor of supplying power, and wherein said electric member comprises said dielectric constant sensor.

24. shredder security system as claimed in claim 23, wherein said touching stopped inductive pick-up and is connected kneader bar, the shredder base construction of metal, the kneader bar pad of metal or at least one in the metal blade spacer.

25. a shredder comprises:

Be arranged on the starting switch on the shredder, and when being configured to contact with said starting switch when mincing, said starting switch is sent to induced electricity on the electrical equipment of shredder;

The dielectric constant sensor; Be configured to receive above-mentioned induced electricity; Wherein said dielectric constant sensor generates the dielectric constant induction zone, minces when having changed the medium of said dielectric constant induction zone when said therein, and said dielectric constant sensor can order about the movement pulverizing of can mincing;

Timer is activated by said starting switch, and the electrical equipment of the delay time that wherein said timer is set to preset to the back from said shredder breaks off electric power; And

Said shredder comprises conductive member at the shredder base construction of metal in the kneader bar pad of metal or at least one of metal blade spacer;

The touch-control control circuit; Can respond from biology and reach the electrical signal of reaction on the said conductive member; Wherein said touch-control control circuit is configured in response to the electrical equipment disconnection electric power of the electrical signal of reaction of receiving from said conductive member from shredder, and wherein shredder is autonomous.

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